春季引导应用程序 – 无法注册该Bean

huangapple
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标题翻译

Spring Boot application-The bean could not be registered

问题

我刚刚创建了一个新的Spring Boot Starter项目，我正在尝试使用MongoRepository（提到这个是因为我觉得这可能与我的问题有关），我只有4个类我正在尝试运行，如下所示：

User.java

  1. @Entity
  2. public class User {
  4.     @Column(name = "id")
  5.     @Id
  6.     private Long id;
  8.     @Column(name = "name")
  9.     private String name;
  11.     @Column(name = "email")
  12.     private String email;
  14.     @Column(name = "password")
  15.     private String password;
  16. }

UserController.java

  1. @RestController
  2. public class UserController {
  4.     @Autowired
  5.     private UserRepository userRepository;
  7.     @PostMapping("/AddUser")
  8.     private ResponseEntity<?> getDistance(@RequestBody User user) throws Exception {
  9.         userRepository.save(user);
  10.         return ResponseEntity.ok(user);
  11.     }
  12. }

UserRepository.java

  1. @Repository
  2. public interface UserRepository extends MongoRepository<User, Long> {
  3. }

Main Class

  1. @SpringBootApplication
  2. public class DemoApplication {
  4.     public static void main(String[] args) {
  5.         SpringApplication.run(DemoApplication.class, args);
  6.     }
  7. }

build.gradle

  1. plugins {
  2.     id 'org.springframework.boot' version '2.2.5.RELEASE'
  3.     id 'io.spring.dependency-management' version '1.0.9.RELEASE'
  4.     id 'java'
  5. }
  7. group = 'com.javademos'
  8. version = '0.0.1-SNAPSHOT'
  9. sourceCompatibility = '1.8'
  11. repositories {
  12.     mavenCentral()
  13. }
  15. dependencies {
  16.     implementation 'org.springframework.boot:spring-boot-starter-data-jpa'
  17.     implementation 'org.springframework.boot:spring-boot-starter-web'
  18.     compile group: 'org.springframework.boot', name: 'spring-boot-starter-data-mongodb', version: '2.2.5.RELEASE'
  19.     implementation 'com.google.maps:google-maps-services:0.1.7'
  20.     testImplementation('org.springframework.boot:spring-boot-starter-test') {
  21.         exclude group: 'org.junit.vintage', module: 'junit-vintage-engine'
  22.     }
  23. }
  25. test {
  26.     useJUnitPlatform()
  27. }

项目结构：

（项目结构图片）

但是每次我运行代码时，我都会收到一个异常，上面写着：

  1. ***************************
  2. APPLICATION FAILED TO START
  3. ***************************
  5. Description:
  7. The bean 'userRepository' could not be registered. A bean with that name has already been defined and overriding is disabled.
  9. Action:
  11. Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true
  13. Process finished with exit code 1

我已经仔细检查过，我没有重复使用任何注解，尤其是@Repository。

我已经看过了这个问题，但还是不起作用。

我只想知道为什么它会显示：

  1. The bean 'userRepository' could not be registered. A bean with that name has already been defined and overriding is disabled.
  3. While I have only One Repository in my project
英文翻译

I have just created a new Spring-boot-starter project and I am trying to use MongoRepository (Mentioning because I feel that this could be related to my problem) and I only have 4 classes that I am trying to run, like:

User.java

  1. @Entity
  2. public class User {
  4.     @Column(name = &quot;id&quot;)
  5.     @Id
  6.     private Long id;
  8.     @Column(name = &quot;name&quot;)
  9.     private String name;
  11.     @Column(name = &quot;email&quot;)
  12.     private String email;
  14.     @Column(name = &quot;password&quot;)
  15.     private String password;
  16. }

UserController.java

  1. @RestController
  2. public class UserController {
  4.     @Autowired
  5.     private UserRepository userRepository;
  7.     @PostMapping(&quot;/AddUser&quot;)
  8.     private ResponseEntity&lt;?&gt; getDistance(@RequestBody User user) throws Exception {
  9.         userRepository.save(user);
  10.         return ResponseEntity.ok(user);
  11.     }
  12. }

UserRepository.java

  1. @Repository
  2. public interface UserRepository extends MongoRepository&lt;User, Long&gt; {
  3. }

Main Class

  1. @SpringBootApplication
  2. public class DemoApplication {
  4. 	public static void main(String[] args) {
  5. 		SpringApplication.run(DemoApplication.class, args);
  6. 	}
  8. }

build.gradle

  1. plugins {
  2.     id &#39;org.springframework.boot&#39; version &#39;2.2.5.RELEASE&#39;
  3.     id &#39;io.spring.dependency-management&#39; version &#39;1.0.9.RELEASE&#39;
  4.     id &#39;java&#39;
  5. }
  7. group = &#39;com.javademos&#39;
  8. version = &#39;0.0.1-SNAPSHOT&#39;
  9. sourceCompatibility = &#39;1.8&#39;
  11. repositories {
  12.     mavenCentral()
  13. }
  15. dependencies {
  16.     implementation &#39;org.springframework.boot:spring-boot-starter-data-jpa&#39;
  17.     implementation &#39;org.springframework.boot:spring-boot-starter-web&#39;
  18.     compile group: &#39;org.springframework.boot&#39;, name: &#39;spring-boot-starter-data-mongodb&#39;, version: &#39;2.2.5.RELEASE&#39;
  19.     implementation &#39;com.google.maps:google-maps-services:0.1.7&#39;
  20.     testImplementation(&#39;org.springframework.boot:spring-boot-starter-test&#39;) {
  21.         exclude group: &#39;org.junit.vintage&#39;, module: &#39;junit-vintage-engine&#39;
  22.     }
  23. }
  25. test {
  26.     useJUnitPlatform()
  27. }

Project Structure:

春季引导应用程序 – 无法注册该Bean

But everytime I run the code I get an exception saying:

  1. ***************************
  2. APPLICATION FAILED TO START
  3. ***************************
  5. Description:
  7. The bean &#39;userRepository&#39; could not be registered. A bean with that name has already been defined and overriding is disabled.
  9. Action:
  11. Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true
  14. Process finished with exit code 1

I have double-checked and I am not using any annotation twice, Especially @Repository.

I have seen this question and it is still not working.

I just want to know why exactly is it saying

  1. The bean &#39;userRepository&#39; could not be registered. A bean with that name has already been defined and overriding is disabled.

While I have only One Repository in my project

答案1

得分: 11

从build.gradle中移除implementation 'org.springframework.boot:spring-boot-starter-data-jpa'

如果你确实需要同时使用两种类型的存储库（jpa和mongo），你可以通过排除过滤器来调整它们的扫描。类似于：

  1. @EnableMongoRepositories(basePackageClasses = UserRepository.class)
  2. @EnableJpaRepositories(excludeFilters = 
  3.   @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = UserRepository.class))
  4. @SpringBootApplication
  5. public class DemoApplication {
  7.     public static void main(String[] args) {
  8.         SpringApplication.run(DemoApplication.class, args);
  9.     }
  11. }
英文翻译

Remove implementation &#39;org.springframework.boot:spring-boot-starter-data-jpa&#39; from build.gradle

If you really need to use both types of repositories (jpa and mongo), you can play with exclusion filters for their scanning. Smth like:

  1. @EnableMongoRepositories(basePackageClasses = UserRepository.class)
  2. @EnableJpaRepositories(excludeFilters = 
  3.   @ComponentScan.Filter(type = FilterType.ASSIGNABLE_TYPE, value = UserRepository.class))
  4. @SpringBootApplication
  5. public class DemoApplication {
  7.     public static void main(String[] args) {
  8.         SpringApplication.run(DemoApplication.class, args);
  9.     }
  11. }

huangapple
  • 本文由 发表于 2020年3月16日 20:28:26
  • 转载请务必保留本文链接：https://java.coder-hub.com/60706042.html
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